John j



(No Mof'lel.)

J. J. RIDGWAY.

LOCK.

Patented, Jilly 16, 1895.

UNrrED j STATES PATENT OFFICE.

JOHN .I. 'RIDGWAY, OF BROOKLYN, NEW YORK.

LOCK.

SPECIFICATION forming part of Letters PatentNo. 542,777, dated July 16, 1895.

Application filed November 28, 1894. Serial No. 530,223. (No model.)

. @o a/ZZ whon it may concern Beit known that LJOHN J. RIDGWAY, a citizen ofthe United States, residing at Brooklyn, in the county of-Kings and State of New York, have invented a new and useful Improvement in Locks, of which the following is a specification.

My present invention is designed as animprovement upon the lock shown and described in Letters Patent No. 513,279, granted to me January 23, 1894:. In said Letters Patent the latch-bolt was operated by a knob from the inside of the door or by a key from the outside and was retracted into the lock-casing upon the release of the holding-tumbler and again projected by a spring after the opening of the door, the tumbler being held ont of engagement, and when the door was thereafter shut the striking-plate retracted the latchbolt a second time and released the tumbler, and as the spring again projected the latchbolt the mechanism of the lock was operated, so that the door was securely locked-by the engagement of the tumbler and could not thereafter be opened except by the knob from the inside or a keyfroln the outside.

In my present invention the operation of the parts is identical with those just described, the object of the present invention being to simplify, compact, and strengthen the parts of the lock and to perfect the details of the operating mechanism. l

In carrying out my invention I provide a cam-plate connected to the spindle and which is provided with a slot, and the latch bolt is provided with a raised inner end against which the cam-plate acts directly, and the tumbler is provided with a pin which passes into the slot of the cam-plate, and the springtail is connected to and moves with the latchbolt, so as to come beneath or above a nose on the tumbler as the same is swung by the ,cam-plate in the operation of the parts. construction isless expensive to manufacture and the lock is simpler in its details and is.

stronger and more compact than the mechanism of my aforesaid patent.

In the drawings, Figure l'is an elevation of the lock mechanism with the parts in the position they assume when locked with the latch- This bolt projection. Fig. 2 is a vertical cross-section of the same at the line a' of Fig. l. Fig. 3 is an elevation similar to Fig..l with the parts in the position they assume when the latch-bolt'is retracted by the operation of the key or knob. Fig. 4 is an elevation similar to Figs. l and 3 with the parts in the position they assume when the released latch-bolt is projected by its spring andthe spring-tail engages the tumbler to keep the same outI of contact with the latch-bolt, and Fig. 5 is a sectional plan at the line y y of Fig. 4.

'lhe lock-case is to be of any-desired con.- struction and is Yusually made with top, bottom, back, and end plates and with a removable cap-plate or cover, and the latch-bolt a. is provided as usual with a beveled end a to enter the opening in the striking-plate upon the door-casing. The central portion ot' the latch-bolt is open for the passage ofthe spindle b, and this spindle b is operated by a knob b upon the inside oi' the door or byakey mechanism from the outside of the door. Thelatchbolt a is provided with a notch 2 on its lower edge and with a raised inner end a2, upon the upper part' of which is a vertical face 4 and upon the lower part ot` which isa notch and adjacenttothe notch abackward projection 3, in which is secured the spring-tailf, and there is a corner stop 5 in the lock-case.

Connected to the spindle b is a cam-plate c having an upward projection c' and provided with a lower projection, in which is a slot 6 having two parts, the one at au angle to the other, and d is the spring for projecting the latch-bolt. The tumblere is located beneath the cam-plate and is provided with a pivot 1l in the lock-case, and with a dog or head e and a nose at the opposite end at 8, and with a projecting pin 7 passing through the slot 6 of the cam-plate c, and fis a spring connected to the lock-case for'elevating the dog e of the tumbler, so that it may engage the notch 2 of the latch-bolt. with aguide-block l2 above the latch-bolt and with a central hub 9, through which passes the spindle b of the cam-plate c.

In the position of the parts shown in Fig. l the latch-bolt ais projected and the parts are in the position they will occupy when the door The lock-case is provided IOO islocked, the beveled end a being in the opening in the striking-plate. To open the door the knob b' is turned from the inside or a key mechanism from the outside to rotate the spindle b, and with it to turn the eamplate c and bring the lower end of the cam-plate against the raised inner end a2 of the latchbolt and retract the latch-bolt into the case in the position shown in Fig. 3, the parts stopping against the corner stop 5 of the case. In this movement as the cam c is turned with the spindle its slot 6 operates the pin 7 to swing the tumbler e against the action of the spring f. This depresses the dog e and removes the same from the notch 2 of the latchbolt before the lower end of the cam-plate c comes in contact with the raised inner end a2 of the latch-bolt, andas the cam gradually forces back the latch-bolt the tumblerl is turned further until its back end or nose Sis elevated above the line of the spring-tailf. In this position the movement is completed and the door is open, after which the parts are presumed to be released, and when released the spring d projects the latch-bolt a, and in so doing turns the cam c and spindle, and the action of the slot 6 is to partially turn the tumbler c and to bring its nose S down upon the spring-tail f', or, in other words, the spring-tail underrides the nose S and supports the tumbler in this position, so that the dog e is kept out of the notch 2 of the latchbolt. This position is shown in Fig. 4. It' now the door is slammed to or otherwise shut, the striking-plate acts upon the beveled end a of the latch-bolt and retracts the latch-bolt into the case. This movement simply affects the latch-bolt and its raised inner end d2, the spring-tail f', and the spring CZ, but does not necessarily move the spindle or cam-plate. This backward movement carries the springtail clear of the nose 8, so that the spriugj' is free to act and swing the tumblere and carry its dog e' up against the under edge of the latch-bolt. As the door shuts, the spring d again projects the latch-bolt, and as projected the dog e' enters the notch 2 and the parts are locked, and the latch-bolt cannot be again operated or retracted except by the knob b from the inside or a key mechanism from the outside, in the lmanner hereinbefore described. This locked position is shown in Fig. 1, wherein the upper vertical face4 comes against the vertical face of the upward projection c and the stability of the partsis more perfectly assured.

I claim as my inventionl. The combination with a springlatch bolt and its tumbler, of a cam plate for acting upon and retracting the bolt and having a slot, means for turning the cam plate, a pin upon the tumbler operating in said slot for disconnecting and swinging the tumbler before the movement of the bolt, means connected to and moving with the latch boltforholding the tumbler out of engagement with the latch bolt when the same is again projected and which means release the tumbler when the bolt is again retracted so that the tumbler may engage the latch bolt upon its second projection and lock the parts, substantially as set forth.

2. The combination with a spring latch bolt having a raised inner end, a notch 2 and a spring tail connected therewith, of a spring actuated tumbler having a dog or head at one end and a nose at the other end over-riding or under-riding the spring tail of the latch bolt, a spindle and means for operating the same, and means connected with the spindle and engaging the tumbler to operate the same and the spring latch bolt, substantially inthe manner and for the purposes set forth.

3. The combination with the spring latch bolt a its raised inner end a2 and the spring tailf connected therewith anda notch Z in its lower edge, ot' the spring actuated tumbler e having aA dog or head c at one end to engage the notch 2 and a nose 8 at the other end, and a pin 7 adjacent to the nose 8, the spindle b, the cam plate c connected therewith and baving a curved slot 6 in its lower portion receiving the pin 7 of the tumbler e whereby with the movement of the spindle and the canithc tumbler is disengaged therefrom and turned to bring its back end above the spring tail andthe latch bolt is simultaneously retracted said tumbler being kept out of engagement with the latch bolt when projected and is released when said latch bolt is again retracted so as to engage the latch bolt at its second projection, substantially as set forth.

Signed by me this 19th day of November, A. D. 189i.

JNO. J. RlDGlVAY.

Witnesses:

GEO. T. PINCKNEY, HAROLD SERRELL. 

